fix(Artwork): allow style properties to be set inline, add support for gradient and fillColor

[anthony9187]

Description

This PR updates the Artwork component with the following changes:

• moves all types to a shared types file
• adds support for setting any ArtworkStyleProperties via inline component props
• adds a story file for Artwork - examples of Artwork are now displayed in the docs 🥳
• updates the Tile and CardContent to work with the refactored Artwork

Also open to any feedback on the separate types file setup. Some of our other projects use this setup and, as our types get more complex, it felt more maintainable

Testing

ensure Artwork renders as expected